Which one of the following discoveries involving dna happened first?

a. griffith learned that a chemical changed harmless cells into harmful cells.
b. sequencing an entire human genome was completed.
c. hershey and chase used bacteriophages to confirm that dna was the genetic material in genes.
d. avery discovered that dna was responsible for storing and passing information through generations.

The answer is atmosphere. there are four spheres of the earth: 1. geosphere (from greek word 'geo' = ground), 2. hydrosphere (from greek word 'hydro' = water), 3. biosphere (from greek word 'bio' = life), and 4. atmosphere (from greek word 'atmo' = air). a magnetosphere is a region of space around astronomical objects controlled by the magnetic field of that object. through the process of elimination, since lightning is present in the air, it can be found in the atmosphere.